lib/prezzo/calculator.rb in prezzo-0.5.1 vs lib/prezzo/calculator.rb in prezzo-1.0.0.pre.rc

@@ -1,22 +1,28 @@
 module Prezzo
   module Calculator
+    def self.included(base)
+      base.class_eval do
+        base.include(ParamsDSL)
+        base.include(ComponentsDSL)
+        base.include(TransientDSL)
+        base.include(Explainable)
+      end
+    end
+
     def initialize(context = {})
-      @context = validated!(context)
+      @context = context
     end
 
     def calculate
-      raise "Calculate not implemented"
+      @total ||= formula
     end
 
+    def formula
+      raise "Formula not implemented"
+    end
+
     private
 
     attr_reader :context
-
-    def validated!(context)
-      raise "Empty Context" if context.nil?
-      raise "Invalid Context" if context.respond_to?(:valid?) && !context.valid?
-
-      context
-    end
   end
 end